The aim of this pretest for the CL-Experiment (CO2 long-term periodic injection experiment) was to find out how the temperature of two synthetic resins behave over time in a borehole.
For this resin pretest, double-walled cylinders (r1 = 2.25 cm, r2 = 2.5 cm, 17 cm high, 325.5 g) made of plastic were used and bedded on sand. The two resins and their coresponding hardener (Sikadur-52 and Biresin CR83 & CH83-10) were mixed at a ambient temperature of 10 °C. The resins poured from a height of 3 m through a plastic tube (diameter 5 mm) once in both annulus and once in the outer annulus into the prepared forms. The temperature was measured with TMP35 sensors (Analog Devices, USA) attached to temperature-resistant silicone cable (wire size 0.25 mm2, Helukabel, Switzerland). The data logging was done every 6 seconds with a WioTerminal (Seeed Technology, China). The data logging and processing code was written with Arduino IDE (version 2.1.0). The data analysis was done with R (version 4.2.2) and RStudio (version 2023.03.0+386).